Lady squids are weird.

It seems that they coat their eggs in a rage-inducing chemical agent that turns male squid into D&D-style Berserker Dire Squids.

(There are totally going to be Berserker Dire Squids in my next D&D game.)

Hilariously, the Christian Science Monitor article about the same thing suggests that human semen could have similar effects. If true, your local pornographic film set just became much more dangerous.

Image is by Solongo Mellecker, found via My Modern Metropolis.
Webcomic is Married to the Sea, by Drew and Natalie.